Samples were prepared for irradiation by polishing the samples to thickness approximately between 60 – 100
Samples were prepared for irradiation by polishing the samples to thickness approximately between 60 – 100
Once each batch was fully cooled they were assigned a sample number, to make the analyzing simpler. Each piece of Knife River Flint was analyzed for the color of its flaked surface, color of its cortex, and luster. Each piece of Knife River Flint was then subjected to knapping with a hard hammer, soft hammer, and pressure flaker to determine their knappability. All the relative information was then gathered and analyzed to see if there was a change in their physical or structural…
Investigation 13 “Who Wrote the Ransom Note?” Did The Sticky Bandit Make an Inky Mistake? Introduction: Early Wednesday morning at approximately 6:19 a.m. the widowed Mrs. Regina Butterworth realized when she went to make some syrup that her infamous syrup recipe had been stolen from her secret cookie jar vault.…
All of the animal experiments were performed under an approved animal use regulation. Wistar rats (200−250 g) were procured from the Laboratory Animal Center. Animals were acclimated for at least 5 days, and fasted overnight before the experiment. 2.4. Standard solutions Standard solutions of 100.0 µg/mL of FLX, RIS, 9-OH-RIS and OLA each were prepared in methanol.…
Demonstration of Cellular Respiration Inside Lima Beans Cells in Vitro Purpose: Cellular respiration is a series of metabolic reactions that take place in the mitochondria and produce chemical energy in the form of ATP by the breakdown of food molecules. There are three processes involved in cellular respiration; glycolysis, the Krebs cycle and the electron transport chain. During this processes, glucose is oxidized by a series of redox reactions and its electrons and hydrogen ions are donated to two electron carriers called NAD+ and FAD.…
Lab 4 in Chem 115 has three parts all calculating density. In part one, a 100 mL beaker, a volumetric pipet, and an analytical scale were obtained. To begin, the mass of the beaker was taken using an analytical scale. Then, 10.0 mL of an unknown liquid was transfered to the beaker using the volumetric pipet. Next, the mass of the beaker and liqiud was recorded along with the letter identifying the unknown liquid.…
Jacari smith Weathering Lab purpose: The purpose of this lab is to investigate the processes of mechanical and chemical weathering. Hypothesis: What will happen to the sugar cubes after shaking. Materials: Sugar cubes (5), Shaker bottles, Digital scale Procedures:1. First u need to shake the 5 sugar cubies and put the information the table 2. Draw a picture of what the sugar cubes look like when you have shaken them 3.…
Percent Copper In Brass Lab Conclusion Emily Oleisky The purpose of this lab was to observe the amount of light a solution absorbs, and use the relationships in the Beer-Lambert Law to determine the quantity of a certain compound within a complex sample. First, the relationships between wavelength, concentration, and absorbance were determined. This lab focused on identifying the absorption of copper in various brass samples, and finding the percent copper in brass. In the first activity of the lab, the scientist was trying to determine the difference in molar absorptivity across various wavelengths of multiple salt solutions.…
1. Fill a mason jar half-full with tepid water. Put it on the hotplate and raise the temperature to 98 degrees. Make sure you can keep it at this temperature for several hours. 2.…
Alendronate is a bisphosphonate. Drugs in this class inhibit bone resorption by osteoclasts. Bisphosphonate are analogues of the naturally occurring substance, pyrophosphate, which is found in tissue fluid and helps regulate bone resorption They specifically act on osteoclasts (bone resorption cells) and promote their apoptosis (e.g. etidronate). Alendronate is more potent and stops the anchoring of the cell surface proteins of osteoclasts. Thus stopping attachment, and inhibiting bone removal (Rang et al., 2016).…
Radioiodine production Radioiodine is defined as a radioactive isotope of the chemical element Iodine. Although there are at least 37 different Iodine radioisotopes, only four of them are used as tracers or therapeutic agents in medicine; these are 123-I, 124-I, 125-I, and 131-I, with the latter being the most common in clinical practice. Essentially all industrial production of radioiodine isotopes involves four aforementioned radionuclides. History of radioiodine production and usage…
Fluoridation of Drinking Water Jack Barth, AP Chemistry Water fluoridation is a common practice in many communities, both in the United States and worldwide. In 2012, 75% of American communities had access to fluoridated drinking water (Center for Disease Control and Prevention, 2015). The CDC also touts the many advantages of fluoridated drinking water, such as lowered tooth decay among families and fewer dollars spent on dental procedures. However, many individuals and medical institutions have spoken out against water fluoridation. There is much controversy surrounding this issue.…
b. Add two drops of 6.0M HCl(aq), 0.5mL 10% Hydroxylamine-HCl, six drops 2.0M Sodium Acetate, and 1.0mL 0.1% 2,2-Dipyridyl solution to the test tube. c. Fill the test tube to the 10mL mark with DI water and the color will fully develop in 15 minutes d. Prepare the four other standard solutions with appropriate amounts of the solutions. 9. The sample uses 2.0mL from the volumetric flask with the dissolved Fe and add the appropriate reagents. 10.…
Method: Purpose: To investigate how Porcellio Scaber reacts in terms of orthokinesis to different humidities in their habitat. Equipment- 75 slaters which range from 5-10mm in length (kept in a plastic container with holes in the lid, with dirt and bark so that they are kept in a natural environment as possible so can react naturally during experiment.) 5x petri dish set ups labelled from 50-90% (One petri dish on the bottom will contain glycerol and have a mesh/gauze hot glued over top for the slater to walk on.…
Finally, we warmed the crucible with the damp sample using a gentle flame for a minute followed by moderate heating for 10 minutes. After we let the crucible cool until it was warm to touch, we weighed the crucible, cover, and the content and…
The melting points of each sample was then observed…